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Length of M8 Bolts for Wall Mounting LN46A550 LCD TV?

by jakewho / December 14, 2008 5:58 AM PST


I am attempting to wall mount my new LN46A550 and I am having trouble determining the right length M8 bolt to use. The bolts which came with the TV are ~ 16mm in length and they are way too short. I can't even get the threads to begin to engage, when I put the mounting bracket on the back of the tv and try and put the bolt through the bracket (and the bracket seems to be a normal thickness).

The rack I bought comes with 16mm and 40mm length bolts. As mention above, the 16mm bolts are way too short, but the 40mm bolts are way too long.

Does anyone know the correct length bolt?



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Length of bolts...
by Samsung_HD_Tech Samsung staff / December 14, 2008 3:46 PM PST


Unfortunately I can't really recommend anything as it pertains to installations. I'm sorry, Michael, I'd hate to be wrong and have your television fall.

Forum members, can we help out? Does anyone know?


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Why is Samsung 'non-standard' on the hardware?
by mconsumer / February 23, 2013 8:34 AM PST
In reply to: Length of bolts...

Had no problems with Vizio or Phillips. So you won't provide info on screws to use to wall mount? This tv is going back to Costco despite the deep discount they had on this model. I will pick up something that from a manufacturer that takes no joy in making things difficult for its customers.

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Re: What info do you need?
by Samsung_HD_Tech Samsung staff / February 26, 2013 7:32 AM PST

Hi mconsumer,

I'd be more than happy to assist you, but it might be best to start a need thread and mention the model code and what info you need as this thread is really old.


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You start the thread
by gregorta / April 30, 2016 10:16 PM PDT

You are the Samsung HD tech. Why not own the problem, start the thread, and produce useful information? I have the same issue, there were no instructions in the box nor can I find any on the Samsung site that address this problem!

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Closing this 2008 thread.
by R. Proffitt Forum moderator / May 1, 2016 10:54 AM PDT
In reply to: You start the thread

It's old and if you need a part like a mounting screw, I found them for most US models at

It's fair to ask for the model number.
Not fair to dis the Ambassador in this case.

Case closed.

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by gregorta / April 30, 2016 10:12 PM PDT

Thanks so much for this response. It is really insufferable for Samsung HD Tech to plead ignorance: "does anyone know?"

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I had this same problem ...
by gradja / December 20, 2008 10:00 PM PST

I've purchased 2 Samsungs which I've bought wall mounts for. The first was easy to put up. The second was difficult for the reasons you stated. I believe this is an issue with the company that made the wall mount. They're not supply the necessary h/w. My first one was a Peerless, the second was from Cheetah.

Anyway, back to your problem. My suggestion would be to try going to Lowe's or Home Depot to see if they have the bolts you need. Outside of that, return the mount and get a Peerless mount. I was very satisfied with mine.

I prefer the Peerless, not only because of ease of installation, but the fact that it allows tilting up to access cable inputs. I was saved by the Peerless install since it came with a number of extra bolts which I was able to use for the Cheetah mount.

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Bolt length
by Dan Filice / December 30, 2008 9:13 AM PST


Not sure if this is what you were asking in your original post, but if you need to determine the correct bolt length for the bolt holes in the back of your TV, use a toothpick or straw to place them in the bolt holes in the back of your TV and mark the depth with a marker. This will be the maximum length and you do NOT want to go longer. The thickness of the wall mount should keep the bolt from threading all the way in.

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TV Manual says....
by ainapo3 / December 5, 2015 5:50 AM PST

According to the manual that came with my 48 inch TV, Page 17 Section 7 [English version], the bolt lengths for mounting to a 3rd party wall mount kit are to be between 21.5 and 22.5 mm, M8 standard Screw. That's for a TV that is 43-50 inches. A 40 inch TV is 32.5 - 33.5mm.

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by hamedanidani / December 11, 2015 4:05 PM PST
In reply to: TV Manual says....

Try Auton's website, they have a lot of specs for different mounts on their page.

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